Disable uniform uploads when testing on Travis (tensorflow#1393)

- Disable uniform uploads when testing on travis.
- Change the default epsilon for 16bit float devices to 1e-4 instead of 1e-3 and change the clip test to stop testing `1-epsilon < 1` since the IEEE 754 buckets around 1 are different than around 0.
- Bring back node 8 testing since the LTS is for another 14 months. And test cpu backend in both node envs.

DEV

increase version to 13.11 (tensorflow#1389)

Update version to 0.13.10 and improve publish-npm script (tensorflow#…

…1380)

Turns out we released 0.13.9 in a bad state where there was logging statements in the master branch right before `publish-npm` was called -- search for "logFnCall" in https://unpkg.com/@tensorflow/[email protected]/dist/tf-core.js

Update the version to 0.13.10 and improve the publish-npm script to fail whenever the master branch is not clean.

BUG, DEV

upgrade the version to 0.13.9 (tensorflow#1373)

Bump version to 0.13.8. (tensorflow#1348)

Bump version: 0.13.6 --> 0.13.7 (tensorflow#1338)

bump version to v0.13.16 (tensorflow#1315)

DEV 0.13.15 --> 0.13.16

Bump version: 0.13.4 --> 0.13.5 (tensorflow#1311)

v0.13.4 (tensorflow#1306)

increase the version to 0.13.3 (tensorflow#1297)